| Filling of the Three Gorges Reservoir to the 135-m Level： Instant Effects on the Yangtze Discharge and Suspended Sediment Concentration Entering the Estuary |
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| 作者单位： | Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Ocean University of China, Qingdao 266100, P. R. China |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，山东省自然科学基金，the Doctoral Fund of Ministry of Education of China，the Key Lab of Submarine Geosciences and Prospecting Techniques of the Ministry of Education |
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| 摘 要： | Via the valuable opportunity of the Three Gorges Reservoir (TGR) 135-m filling in June 2003, the Yangtze discharge and suspended sediment concentration (SSC) entering the estuary during the period from 15 May to 15 July 2003 were analyzed to examine the instant effects of the filling on them. The Yangtze discharge and SSC entering the estuary in the periods before, during and after the filling clearly indicated three phases: 1) the pre-storage phase characterized by natural conditions, in which the SSC incr...
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| 关 键 词： | 三峡水库蓄水 长江上游 水流量 悬浮泥沙浓度 河口 即时 填补 南南合作 |
Filling of the Three Gorges Reservoir to the 135-m level: Instant effects on the Yangtze discharge and suspended sediment concentration entering the estuary |
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| Authors: | Zhongxin Chu Shikui Zhai Jing Zhang Dong Ding |
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| Institution: | Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Ocean University of China, Qingdao 266100, P. R. China |
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| Abstract: | Via the valuable opportunity of the Three Gorges Reservoir (TGR) 135-m filling in June 2003, the Yangtze discharge and suspended
sediment concentration (SSC) entering the estuary during the period from 15 May to 15 July 2003 were analyzed to examine the
instant effects of the filling on them. The Yangtze discharge and SSC entering the estuary in the periods before, during and
after the filling clearly indicated three phases: 1) the pre-storage phase characterized by natural conditions, in which the
SSC increased with increasing water discharge; 2) the storage phase, during which the SSC decreased dramatically with decreasing
water discharge; and 3) the post-storage phase, during which both the SSC and water discharge remained at relatively low levels
first until the end of June, then the SSC increased gradually with increasing water discharge. It seems that the times for
the instant effects of the decreasing discharge downstream from the upper Yangtze on the Yangtze discharge and SSC entering
the estuary due to the TGR 135-m filling to take place were about 5 d and 1 d respectively, while both were about 18 d for
those of the increasing discharge. This probably reflects the buffering and resultantly hysteresis of the 1800-km stretch
from the upper Yangtze to the estuary. The results are helpful for scientific and hydrological investigation of the Yangtze
mainstream downstream from the TGR Dam and of the estuarine and adjacent coastal waters. |
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| Keywords: | Three Gorges Reservoir (TGR) 135-m filling Yangtze River estuary water discharge suspended sediment concentration |
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